Here are the minimum parts needed to repair a gear box:

Download this spreadsheet with all BMW part numbers:
Click here

Parts details

 

https://i37.servimg.com/u/f37/11/71/56/74/gear-b10.jpg

https://i37.servimg.com/u/f37/11/71/56/74/gear-b13.jpg

https://i37.servimg.com/u/f37/11/71/56/74/gear-b11.jpg

 

 

 

 

 

 

 

https://i37.servimg.com/u/f37/11/71/56/74/gear-b12.jpg